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Old 08-27-2016   #6
Hib Halverson
 
Join Date: Jun 2005
Location: CenCoast California
Posts: 898
Default Re: ALDL Data Logging

I'd say that engine is lean. In closed loop it's adding fuel.

If it were me, I'd put a wideband in the exhaust and take some data at WOT, but I'm going to bet the engine is a tad lean at WOT.

Has the fuel filter been changed recently?

Also, looking at the part throttle sheet, you're getting some KR at only 30% TPS, which is a little surprising. On the full throttle sheet you're getting a little KR at WOT, which, if you're using pump gas and considering the ECT, MAT and that the engine might be lean at WOT, doesn't surprise me.

The only caveat here, and it's a big one, is that your data samples are really short. When I do data logging for part throttle calibration purposes, I take data for 15 even 30 min. Obviously, to do that, I have to use datalogging SW which saves to my laptops HD.

Let's see a third gear run to 5000 rpm.
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Hib Halverson
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former owner 95 VIN 0140
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